Ricerc@Sapienza

This proposal was born in the framework of the collaboration between the DIAEE Nuclear section and ENEA Brasimone research center into the EU H2020 SESAME Project, for the validation of the system code RELAP5-3D© in pool temperature stratification analysis in heavy liquid metal reactor by comparison with experimental data.
In this frame, experimental data from CIRCE-ICE (Integral Circulation Experiments) pool facility at ENEA/Brasimone Research Center test section, which simulates the thermal behavior of a primary system in a HLM cooled pool reactor are available for us. The experimental campaign led to the characterization of mixed convection and thermal stratification in a HLM pool in safety relevant conditions and to the distribution of experimental data for the validation of system codes. The aim of this work is to investigate the capability of the system code RELAP5-3D© to simulate mixed convection and thermal stratification phenomena in a HLM pool in steady state conditions by comparing code results with experimental data, made available by ENEA, simulating the main vessel with a three dimensional component.
In summary, the innovations which this activity aims to achieve are:
- The experimental validation of RELAP5-3D© in natural and gas lift circulation;
- The verification of the capability of the code to reproduce thermal stratification and mixing convection phenomena into the pool.